PT6314 Datasheet, PDF (22/49 Pages) Texas Instruments – 3 Amp Adjustable Positive Step-down Integrated Switching Regulators

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Dot Character VFD Controller/Driver IC
PT6314
SERIAL DATA TRANSFER
PT6314 supports serial data transfer mode. When data is written, it can be inputted when the Strobe
goes to “0”. The first byte -- Start Byte consists of a total of 8 bits : the Synchronous bits (bit 1 - bit 5),
R/W (bit 6), RS (bit 7) and bit 8. The register will be selected (IR or DR) by the RS (bit 7) and the data
write or read is selected by R/W (bit 6 = “0”) in this byte. The Start Byte is followed by the 8-bit
Instruction Byte. The Start Byte selects which is process is to be inputted first: read the Busy Flag +
Address Counter (AC6 to AC0) or read the data which was written in the DDRAM or CGRAM. Data is
outputted at the falling edge of the shift clock.
Data Write
STB
SCK
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
SI
"1" "1" "1" "1" "1" R/W RS "0" D7 D6 D5 D4 D3 D2 D1 D0
Synchronous Bits
Start Byte
Instruction/Data
Data Read
STB
Wait Time: tWAIT
1µs
12345678
12345678
SCK
SI/SO
"1" "1" "1" "1" "1" R/W RS "0"
Synchronous Bits
Start Byte
BF
"0"
IR6
IR5
IR4
IR3
IR2
IR1
IR0
Read Data
PT6314 V1.3
- 22 -
March, 2006